An expansion project at Florida Hospital DeLand has been put on hold after construction workers found a human skull, possibly remains from a roughly 100-year-old "indigent" gravesite.

"We have the remains for safekeeping pending a response from a state anthropologist for direction,'' DeLand Sgt. Chris C. Estes said Tuesday in an email.

Crews uncovered the skull Monday while working a $3.5-million hospital expansion.

"The hospital was built more than 50 years ago, and it is believed that these remains are from an indigent cemetery that was in the area approximately 100 years — or longer — ago," said hospital spokeswoman Lindsay Rew.

The 6,740-square-foot expansion is taking place on the north side of the hospital.

"We are working with the authorities to determine the appropriate next steps," Rew said.